Transforming For Our Future

Select Regulatory Matters - Ameren Illinois Electric Distribution ⚫ In Apr. 2022, requested $83 million annual performance-based rate update from ICC; ~3.5% rate increase request¹ - - Expect ICC decision by Dec. 2022, with new rates effective in Jan. 2023 Major investments included in the request • Installation of outage avoidance/detection technology • · • Integration of storm-hardening equipment and resiliency updates to the electric grid (stronger wires and poles and new substations) Adoption of clean energy technologies, including transitioning portions of the Ameren Illinois fleet to electric vehicles to reduce the company's carbon footprint Implementing new technology to continue customer-centric focus, including optimizing interactions with customers through new platforms Each year's electric distribution earnings are a function of the rate formula and are not directly determined by that year's rate update filing or the current rates charged to customers For a typical non-electric heat residential customer using 10,000 kWh per year, all else equal. Includes June 2021-May 2022 plan year power supply prices. First Quarter 2022 Earnings | May 6, 2022 Ameren ILLINOIS Ameren 16

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